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Database systems are an important part of the IT system. Relational Database Management System is a database that mainly stored data in a relational model by creating different relations between different data. Relational Database Management Systems simply called RDMS. RDMS mainly uses the Structured Query Language simply SQL in order to store and query data. … Read more
The wildcard character generally acts like an asterisk character. The wildcard is generally used in programming, scripting, IT in order to express special meanings for different cases. Wild Character or Wildcard Character or Wildcard Well, the character is actually not important but the function is more important for the wildcard. So different sayings are not … Read more
Select is a very special term used in different programming languages, frameworks or database statements. In this tutorial we will list and explain different usages of the Select statements in SQL, HTML and jQuery. SQL Select Statement The most popular Select keyword is the SQL Select statement. SQL Select statement is used to query and … Read more
Query is a request to an information system to get information for the specific information in which parameters are defined inside the query. The query is mainly used as a database term where database servers are queried for different types of information. Query Parameters An information or database system generally provides a lot of different … Read more
SQL is a defacto language used to manage, query, select, filter data in a relational database. Similar to the programming languages SQL provides comments in order to make the SQL query or clause more readable and put some note. Single-Line Comments We will start with single-line comments. Double dash — is used to create a … Read more
SQL databases provide structured data storage capabilities. We can store data in tables with columns and rows. Other useful features for SQL databases are update capabilities. We can update SQL database data in different ways and constraints. In this tutorial, we will learn how to update database table data with an SQL UPDATE statement and … Read more
During the connection to the Oracle Database server with the sqlplus we may get an error with the ORA-12162 specifier. This error will prevent to connect to the Oracle Database Server. “ORA-12162: TNS:net service name is incorrectly specified” Error This error will be look like below. This error is caused by not setting $ORACLE_HOME and $ORACLE_SID … Read more
sqlplus or sqlplus64 tools are used to connect and manage Oracle Databases. sqlplus64 is 64 bit version of the sqlplus. After installating these tools successfully when we try to run sqlplus command we may get an shared object file or library error. sqlplus Shared Library Error sqlplus command shared library error full definition is like … Read more
Oracle is very popular database which is used by big enterprises, banks, governments etc. Oracle Database provides a lot of useful features to the MS SQL, PostgreSQL, MySQL etc. Oracle Express is lightweight database server provided by Oracle. We can use Oracle Express Edition without a fee. Oracle Express Edition is named as Oracle XE … Read more
SQL Programming language and SQL Database engines provide some useful mechanisms in order to make management of the data easier. SQL View is one of them which can be used to create a table from a SQL result set. What Is SQL View? SQL View is a virtual table which does not exist in a … Read more